The invention provides a feeding device with the adjustable outward-spinning diameter in opposite roller spinning equipment and relates to an outward-spinning feeding device. Through the feeding device, the problems that according to existing molded spinning equipment, the mold cost is high, the universality is poor, and the manufacturing cycle is long are solved. Four T-shaped sliding rails are formed in a spinning roller base guide plate. A plurality of outer spinning roller assemblies are slidably installed on the T-shaped sliding rails. A ratchet guiding plate is installed on the spinning roller base guide plate. A guide plate pressing board is pressed on the ratchet guiding plate. A ratchet plate is embedded in the ratchet guiding plate. Each outer spinning roller assembly is provided with a back gear. A ratchet pressing board is installed on the ratchet plate. A turbine and a turbine fixing base are sequentially installed on the ratchet pressing board from top to bottom. A worm fixing board is installed on the guide plate pressing board in a buckled mode. A worm box is installed on a worm fixing board. A worm is installed on the worm box. The output end of the worm is connected with a speed reducer. The speed reducer is connected with a motor. The feeding device is suitable for the thin-walled cylindrical opposite roller spinning equipment.